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Nightscout Configuration⌁
APPLIES TO: 
Editing Config Vars in Heroku⌁
See here where and how to change your variables.
APPLIES TO: 
You can change your settings in the Control Panel see here for available variables and plugins.
Nightscout Config Vars⌁
Required variables⌁
MONGODB_URI ⌁
The connection string required to access your database (where all your data is stored in the cloud).
This string is vital to your Nightscout functioning. A wrong connection string will prevent your site to open and your data to upload in Nightscout
An Atlas database string will look like this:
API_SECRET⌁
This is an important password
Knowing your site’s API Secret gives anybody full access to your Nightscout data, allows uploading to your site and uncontrolled access. Make sure you keep this password secret and avoid exposing it publicly.
A passphrase that must be at least 12 characters long.
This is the passcode that will be required by the uploader app (if any) to send data to your site, and that will allow you to modify your site parameters from the web interface. Keep it secret, only share it with trusted people, change it if you believe it’s been exposed publicly. Minimum length is 12 characters, don’t make it too long and do not put special characters in it (better stick to letters and numbers). It is case-sensitive.
MONGO_COLLECTION ( entries )⌁
Deprecated (set as system default) from 14.0.7
DISPLAY_UNITS⌁
Preferred BG units for the site: mg/dl or mmol/L (or just mmol ). Setting to mmol/L puts the entire server into mmol/L mode by default, no further settings needed.
Features⌁
ENABLE⌁
Select the right plugins! Better too many than not enough.
Plugins to enable for your site. Must be a space-delimited, lower-case list.
Include the word bridge here if you are receiving data from the Dexcom Share service.
If you don’t want to decide now, add all the followings, you can disable them if you don’t need them:
DISABLE⌁
Used to disable default features, expects a space delimited list.
For example this will disable the direction arrow and uploader battery information:
BASE_URL⌁
Used for building links to your site’s API, i.e. Pushover callbacks, usually the URL of your Nightscout site.
AUTH_DEFAULT_ROLES⌁
IMPORT_CONFIG⌁
Used to import settings and extended settings from a url such as a gist. Structure of file should be something like: <"settings": <"theme": "colors">, «extendedSettings»: <"upbat": <"enableAlerts": true>>>
TREATMENTS_AUTH⌁
Alarms⌁
These alarm setting affect all delivery methods (browser, Pushover, IFTTT, etc.). Values and settings entered here will be the defaults for new browser views, but will be overridden if different choices are made in the settings UI.
ALARM_TYPES ( simple )⌁
Keep the simple type if you want BG_ parameters (setup below) to be used.
Simple alarms trigger when BG crosses the various thresholds set below.
Predict alarms uses highly tuned formula that forecasts where the BG is going based on its trend. You will not get warnings when crossing any of the BG_ thresholds set below when using only the predict type.
BG_HIGH ( 260 )⌁
Urgent High BG threshold, triggers the ALARM_URGENT_HIGH alarm.
BG_LOW ( 55 )⌁
Urgent Low BG threshold, triggers the ALARM_URGENT_LOW alarm.
BG_TARGET_BOTTOM ( 80 )⌁
Low BG threshold, triggers the ALARM_LOW alarm.
BG_TARGET_TOP ( 180 )⌁
High BG threshold, triggers the ALARM_HIGH alarm.
You can setup alarms, so that when your Nightscout page is open and the alarm enabled, above ( HIGH ) or below ( LOW ) a certain threshold, a sound might play.
ALARM_URGENT_HIGH ( on )⌁
Default setting for new browser views, for the Urgent High alarm (triggered when BG crosses BG_HIGH ). ( on or off )
ALARM_HIGH ( on )⌁
Default setting for new browser views, for the High alarm (triggered when BG crosses BG_TARGET_TOP ). ( on or off )
ALARM_LOW ( on )⌁
Default setting for new browser views, for the Low alarm (triggered when BG crosses BG_TARGET_BOTTOM ). ( on or off )
ALARM_URGENT_LOW ( on )⌁
Default setting for new browser views, for the Urgent Low alarm (triggered when BG crosses BG_LOW ). ( on or off )
ALARM_*_MINS : Only the first value of the space separated list, for options in browser, will be used for pushover.
ALARM_URGENT_HIGH_MINS ( 30 60 90 120 )⌁
Number of minutes to snooze urgent high alarms.
ALARM_HIGH_MINS ( 30 60 90 120 )⌁
Number of minutes to snooze high alarms.
ALARM_LOW_MINS ( 15 30 45 60 )⌁
Number of minutes to snooze low alarms.
ALARM_URGENT_LOW_MINS ( 15 30 45 )⌁
Number of minutes to snooze urgent low alarms.
ALARM_URGENT_MINS ( 30 60 90 120 )⌁
Number of minutes to snooze urgent alarms (that aren’t tagged as high or low).
ALARM_WARN_MINS ( 30 60 90 120 )⌁
Number of minutes to snooze warning alarms (that aren’t tagged as high or low).
Missing data alarms can also be setup, so that when your Nightscout page is open and the alarm enabled, after a certain time without receiving BG, a sound might play.
ALARM_TIMEAGO_URGENT ( on )⌁
ALARM_TIMEAGO_URGENT_MINS ( 30 )⌁
Default setting for new browser views, for the number of minutes since the last CGM reading to trigger an ALARM_TIMEAGO_URGENT alarm.
ALARM_TIMEAGO_WARN ( 180 )⌁
ALARM_TIMEAGO_WARN_MINS ( 15 )⌁
Default setting for new browser views, for the number of minutes since the last CGM reading to trigger an ALARM_TIMEAGO_WARN alarm.
MONGO_TREATMENTS_COLLECTION ( treatments )⌁
The collection used to store treatments entered in the Care Portal, see the ENABLE env var above
MONGO_DEVICESTATUS_COLLECTION ( devicestatus )⌁
The collection used to store device status information such as uploader battery
MONGO_PROFILE_COLLECTION ( profile )⌁
The collection used to store your profiles
MONGO_FOOD_COLLECTION ( food )⌁
The collection used to store your food database
MONGO_ACTIVITY_COLLECTION ( activity )⌁
The collection used to store activity data
PORT ( 1337 )⌁
The port that the node.js application will listen on.
HOSTNAME⌁
SSL_KEY⌁
Path to your ssl key file, so that ssl(https) can be enabled directly in node.js. If using Let’s Encrypt, make this variable the path to your privkey.pem file (private key).
SSL_CERT⌁
Path to your ssl cert file, so that ssl(https) can be enabled directly in node.js. If using Let’s Encrypt, make this variable the path to fullchain.pem file (cert + ca).
SSL_CA⌁
Path to your ssl ca file, so that ssl(https) can be enabled directly in node.js. If using Let’s Encrypt, make this variable the path to chain.pem file (chain).
HEARTBEAT ( 60 )⌁
Number of seconds to wait in between database checks
DEBUG_MINIFY ( true )⌁
Debug option, setting to false will disable bundle minification to help tracking down error and speed up development
DE_NORMALIZE_DATES( true )⌁
The Nightscout REST API normalizes all entered dates to UTC zone. Some Nightscout clients have broken date deserialization logic and expect to received back dates in zoned formats. Setting this variable to true causes the REST API to serialize dates sent to Nightscout in zoned format back to zoned format when served to clients over REST.
Predefined values for your browser settings (optional)⌁
TIME_FORMAT ( 12 )⌁
Possible values 12 or 24
NIGHT_MODE ( off )⌁
Possible values on or off
SHOW_RAWBG ( never )⌁
CUSTOM_TITLE ( Nightscout )⌁
This will change your Nightscout displayed name (top left) from default.
The display name for the Nightscout site. Appears in the upper left of the main view. Often set to the name of the CGM wearer.
THEME ( colors )⌁
Default setting for new browser views, for the color theme of the CGM graph.
SHOW_PLUGINS⌁
Default setting for whether or not these plugins are checked (active) by default, not merely enabled. Include plugins here as in the ENABLE line; space-separated and lower-case.
SHOW_FORECAST ( ar2 )⌁
Plugin forecasts that should be shown by default, supports space delimited values such as «ar2 openaps»
LANGUAGE ( en )⌁
Language of Nightscout. If not available English is used.
Currently supported language codes are: bg (Български), cs (Čeština), de (Deutsch), dk (Dansk), el (Ελληνικά), en (English), es (Español), fi (Suomi), fr (Français), he (עברית), hr (Hrvatski), it (Italiano), ko (한국어), nb (Norsk (Bokmål)), nl (Nederlands), pl (Polski), pt (Português (Brasil)), ro (Română), ru (Русский), sk (Slovenčina), sv (Svenska), tr (Turkish), zh_cn (中文（简体)), zh_tw (中文（繁體))
SCALE_Y ( log )⌁
The type of scaling used for the Y axis of the charts system wide.
The default log (logarithmic) option will let you see more detail towards the lower range, while still showing the full CGM range.
The linear option has equidistant tick marks; the range used is dynamic so that space at the top of chart isn’t wasted.
The log-dynamic is similar to the default log options, but uses the same dynamic range and the linear scale.
EDIT_MODE ( on )⌁
BOLUS_RENDER⌁
Settings to configure Bolus rendering
Predefined values for your server settings (optional)⌁
INSECURE_USE_HTTP ( false )⌁
Setting this variable to true will allow (unsafe) http traffic to your Nightscout instance and is not recommended.
SECURE_HSTS_HEADER ( true )⌁
SECURE_HSTS_HEADER_INCLUDESUBDOMAINS ( false )⌁
SECURE_HSTS_HEADER_PRELOAD ( false )⌁
SECURE_CSP ( false )⌁
SECURE_CSP_REPORT_ONLY ( false )⌁
Split View⌁
To display the split view browse to:
8 split view example:
Plugins⌁
Plugins are used to extend the way information is displayed, how notifications are sent, alarms are triggered, and more.
If you want the ENABLE ‘d plugins to show by default on any browser, you should put them in the SHOW_PLUGINS variable.
If you want to specifically disable a plugin (mainly a default plugin) you should place it in the DISABLE variable.
You also can decide to visualize them or not on your Nightscout view with the drawer menu. Authenticate and Save the settings on your browser. Heroku variables will not be modified and only default view will be seen on a new browser window.
Default Plugins⌁
Hovering the mouse on (computer) or touching (touch screen) some plugins will give you additional information.
delta (BG Delta)⌁
Calculates and displays the change between the last 2 BG values. Delta shows a * if time difference is more than 5 minutes.
direction (BG Direction)⌁
Displays the trend direction.
upbat (Uploader Battery)⌁
timeago (Time Ago)⌁
Displays the time since last CGM entry. Use these extended setting to adjust behavior:
devicestatus (Device Status)⌁
Used by upbat and other plugins to display device status info. Supports the DEVICESTATUS_ADVANCED=»true» extended setting to send all device statuses to the client for retrospective use and to support other plugins.
errorcodes (CGM Error Codes)⌁
Generates alarms for CGM codes 9 (hourglass) and 10 (. ).
Use extended settings to adjust what errorcodes trigger notifications and alarms:
ar2 (AR2 Forecasting)⌁
Generates alarms based on forecasted values.
You can permanently disable AR2 setting the SHOW_FORECAST variable to false (or removing ar2 if you use it for openaps or loop ).
simplealarms (Simple BG Alarms)⌁
You can click the loudspeaker icon to test the alarms volume or to snooze an active alarm. If you want to use sound alarms, you should click the icon to enable playback at least once after opening your Nightscout page in order to allow the browser to play it.
profile (Treatment Profile)⌁
Add a link in the drawer menu to Profile Editor and allows to enter treatment profile settings. Also uses the extended setting:
More variables of your profile will be used by Nightscout plugins like treatments, see below or here.
dbsize (Database Size)⌁
Show size of Nightscout Database, as a percentage of declared available space or in MiB.
Many deployments of Nightscout use free tier of MongoDB Atlas on Heroku, which is limited in size to 512MiB. After some time, as volume of stored data grows, it may happen that this limit is reached and system is unable to store new data. This plugin provides pill that indicates size of Database and shows (when configured) alarms regarding reaching space limit.
NOTE: This plugin rely on db.stats() for reporting logical size of database, which may be different than physical size of database on server. It may work for free tier of MongoDB on Atlas, since it calculate quota according to logical size too, but may fail for other hostings or self-hosted database with quota based on physical size.
NOTE: MongoDB Atlas quota is for all databases in cluster, while each instance will get only size of its own database only. It is ok when you only have one database in cluster (most common scenario) but will not work for multiple parallel databases. In such case, spliting known quota equally beetween databases and setting DBSIZE_MAX to that fraction may help, but wont be precise.
All sizes are expressed as integers, in Mebibytes 1 MiB == 1024 KiB == 1024*1024 B
Extended settings available:
Advanced Plugins:⌁
careportal (Careportal)⌁
An optional form to enter treatments.
Care Portal is an important plugin that gives access to the Log a treatment interface. Unlock it entering your API secret with the lock icon top right, then use the + icon to log a treatment. More information here.
boluscalc (Bolus Wizard)⌁
Bolus Wizard plugin gives access to the Bolus Wizard interface. You can access it with the calculator icon top right.
food (Custom Foods)⌁
Custom Foods enabled by the variable food allows to to customize your food database and adds a Food Editor entry in the menu.
rawbg (Raw BG)⌁
Calculates BG using sensor and calibration records from and displays an alternate BG values and noise levels. Defaults that can be adjusted with extended setting. Raw BG will only display if your sensor provides this data, your bridge device transfers it and your uploader sends it to Nightscout.
iob (Insulin-on-Board)⌁
Adds the IOB pill visualization in the client and calculates values that used by other plugins. Uses treatments with insulin doses and the dia and sens fields from the treatment profile.
cob (Carbs-on-Board)⌁
When you enter the information with the Care Portal or Nightscout receives if from the uploader, you can see remaining insulin on board and carbs.
bwp (Bolus Wizard Preview)⌁
cage (Cannula Age) / sage (Sensor Age) / iage (Insulin Age) / bage (Battery Age)⌁
cage (Cannula Age)⌁
Calculates the number of hours since the last Site Change treatment that was recorded.
sage (Sensor Age)⌁
Calculates the number of days and hours since the last Sensor Start and Sensor Change treatment that was recorded.
iage (Insulin Age)⌁
Calculates the number of days and hours since the last Insulin Change treatment that was recorded.
bage (Battery Age)⌁
Calculates the number of days and hours since the last Pump Battery Change treatment that was recorded.
treatmentnotify (Treatment Notifications)⌁
Generates notifications when a treatment has been entered and snoozes alarms minutes after a treatment. Default snooze is 10 minutes, and can be set using the TREATMENTNOTIFY_SNOOZE_MINS extended setting.
basal (Basal Profile)⌁
Adds the Basal pill visualization to display the basal rate for the current time. Also enables the bwp plugin to calculate correction temp basal suggestions. Uses the basal field from the treatment profile. Also uses the extended settings:
or icicle (inverted)
bridge (Share2Nightscout bridge)⌁
Glucose reading directly from the Dexcom Share service, uses these extended settings (* mandatory):
mmconnect (MiniMed Connect bridge)⌁
This plugin is NOT functional with Heroku: do not enable it.
Transfer real-time MiniMed Connect data from the Medtronic CareLink server into Nightscout (read more) (* mandatory) with the following extended settings:
pump (Pump Monitoring)⌁
openaps (OpenAPS)⌁
Integrated OpenAPS loop monitoring, uses these extended setting:
loop (Loop)⌁
iOS Loop app monitoring, uses these extended settings:
For remote overrides, the following extended settings must be configured:
override (Override Mode)⌁
Additional monitoring for DIY automated insulin delivery systems to display real-time overrides such as Eating Soon or Exercise Mode:
xdripjs (xDrip-js)⌁
Integrated xDrip-js monitoring, uses these extended settings:
Requires DEVICESTATUS_ADVANCED=»true» to be set
alexa (Amazon Alexa)⌁
googlehome (Google Home/DialogFlow)⌁
Integration with Google Home (via DialogFlow), detailed setup instructions
speech (Speech)⌁
Speech synthesis plugin. When enabled, speaks out the blood glucose values, IOB and alarms. Note you have to set the LANGUAGE setting on the server to get all translated alarms.
cors (CORS)⌁
Enabled CORS so other websites can make request to your Nightscout site, uses these extended settings:
dbsize (Database Size)⌁
Show size of Nightscout Database, as a percentage of declared available space or in MiB.
Many deployments of Nightscout use free tier of MongoDB Atlas on Heroku, which is limited in size to 512MiB. After some time, as volume of stored data grows, it may happen that this limit is reached and system is unable to store new data. This plugin provides pill that indicates size of Database and shows (when configured) alarms regarding reaching space limit.
NOTE: This plugin rely on db.stats() for reporting logical size of database, which may be different than physical size of database on server. It may work for free tier of MongoDB on Atlas, since it calculate quota according to logical size too, but may fail for other hostings or self-hosted database with quota based on physical size.
NOTE: MongoDB Atlas quota is for all databases in cluster, while each instance will get only size of its own database only. It is ok when you only have one database in cluster (most common scenario) but will not work for multiple parallel databases. In such case, spliting known quota equally beetween databases and setting DBSIZE_MAX to that fraction may help, but wont be precise.
All sizes are expressed as integers, in Mebibytes 1 MiB == 1024 KiB == 1024*1024 B
Extended settings available:
Extended Settings⌁
Plugins only have access to their own extended settings, all the extended settings of client plugins will be sent to the browser.
Pushover⌁
In addition to the normal web based alarms, there is also support for Pushover based alarms and notifications.
To get started install the Pushover application on your iOS or Android device and create an account.
Using that account login to Pushover, in the top left you’ll see your User Key, you’ll need this plus an application API Token/Key to complete this setup.
You’ll need to Create a Pushover Application. You only need to set the Application name, you can ignore all the other settings, but setting an Icon is a nice touch. Maybe you’d like to use this one?
Pushover is configured using the following Environment Variables:
IFTTT Maker⌁
In addition to the normal web based alarms, and pushover, there is also integration for IFTTT Webhooks.
With Maker you are able to integrate with all the other IFTTT Services. For example you can send a tweet when there is an alarm, change the color of hue light, send an email, send and sms, and so much more.
Configure Nightscout by setting these webpage environment variables:
Treatment Profile⌁
Some of the plugins make use of a treatment profile that can be edited using the Profile Editor.
Treatment Profile Fields: